Looking for a job

Banjong Tongwandee

@banjongtongwandee

Message

I build enterprise systems and multi-tenant SaaS products from architecture to production.

Thailand

Message

What I'm looking for

I'm looking to build modern full-stack products and enterprise systems where I can own architecture, translate business workflows into software, and continue growing with Rust, React, Next.js, TypeScript, PostgreSQL, and real-time application patterns.

I've built enterprise business systems and modern full-stack products for more than seven years, spanning ERP workflows, legacy modernization, and production SaaS.

Most recently, I designed and engineered Chetdo POS, a commercial multi-tenant restaurant platform covering QR ordering, kitchen workflows, inventory, billing, reservations, loyalty, purchasing, and reporting. I drove the architecture, business rules, security constraints, and validation in a two-developer team.

I built tenant-scoped PostgreSQL data isolation with Row-Level Security, configurable JSONB-based RBAC, SSE-powered floor and table synchronization, and recipe-driven FIFO ingredient deductions. The product uses Rust, axum, sqlx, Tokio, Dioxus, PostgreSQL, Tailwind CSS, and Docker.

Previously, I modernized VB6 engineering applications to VB.NET at Sunny System and supported C# Windows Forms software. At SPCRT and DKSH, I developed and maintained VB.NET and SQL Server ERP modules while translating business requirements into workflow automation and operational features.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Developer

Current

Chetdo POS

May 2026 - Present (4 months)

Designed and engineered a production restaurant Point-of-Sale platform with a two-developer team for commercial deployment. The system covers QR ordering, kitchen workflows, inventory, billing, reservations, and reporting.

Rust Axum Sqlx Tokio Dioxus PostgreSQL Docker SSE RBAC Real Time Systems

Software Engineer

Sunny System

Jul 2022 - Oct 2025 (3 years 3 months)

Converted legacy Windows engineering applications from VB6 to VB.NET Windows Forms while preserving formulas, data behavior, and business logic. Supported C# Windows Forms applications by investigating issues, implementing fixes, and delivering requested enhancements.

VB.NET C#Legacy Modernization SQL Server

Programmer / Application Support

SPCRT

Aug 2018 - Jul 2022 (3 years 11 months)

Developed and maintained ERP modules using VB.NET and SQL Server across quotation, sales orders, purchasing, inventory, after-sales service, reporting, and business workflows. Built automated email workflows triggered by user actions and business approval sequences.

VB.NET SQL Server ERP Development Workflow Automation Application Support

Programmer / Application Support

DKSH (Thailand)

Aug 2018 - Jul 2022 (3 years 11 months)

Continued supporting the same enterprise ERP platform through DKSH's acquisition of SPCRT. Developed and maintained ERP modules using VB.NET and SQL Server across quotation, sales orders, purchasing, inventory, after-sales service, reporting, and business workflows.

VB.NET SQL Server ERP Development Application Support